Solve the problem.A one-story building is 190 ft. by 220 ft. If a square patio with sides 
occupies the center of the building, how much area remains for offices?
A. 748 ft.2
B. 820 ft.2
C. 41,476 ft.2
D. 802 ft.2
Answer: C
Mathematics
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Find the exact value of the expression.tan-1
A. 
B. 
C. 
D. 
Mathematics
Solve the system using Gauss-Jordan elimination.
a. w = -7 + z, x = -z, y = -7 z, z
b. w = 7 + z, x = -z, y = 7 + z, z
c. w = 7 + z, x = -z, y = -7 -z, z
d. w = 7 - z, x = -z, y = -7 z, z
e. w = -7 + z, x = -z, y = 7 - z, z
Mathematics
Simplify. Assume that variables can represent any real number.
A. 4
b2
B. 4
ab2
C. 7
b2
D. 7
b4
Mathematics
Without using a calculator, determine the system of inequalities needed for the calculator-generated graph.
A. y ? 0 x2 + y2 ? 16 B. y ? 0 x2 + y2 ? 16 C. y ? 0 x2 + y2 ? 16 D. y ? 0 x2 + y2 ? 16
Mathematics